This standard specifies the terminology, calculation basis and calculation method of casting material consumption process quota. This standard is applicable to the calculation of quotas for metal material consumption and coke consumed for melting metal during the casting production process. JB/T 6983-1993 Calculation method for casting material consumption process quota JB/T6983-1993 Standard download and decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
The subject content and scope of application of the calculation method of the casting material consumption process quota
This standard specifies the terminology, calculation basis and calculation method of the casting material consumption process quota, JB/T 6983 93
This standard is applicable to the calculation of quotas for metal material consumption and coke consumed for melting metal during the casting production process. 2 Terms
2.1 Material quotas
In-spec production technology Under the conditions, the total weight of metal materials consumed to produce unit products or parts. 2.2 Total weight of metal charge
The sum of the weights of various metals thrown into the furnace for the production of certain casting(s) within a certain period (month, quarter, year). 2.3 Parts weight
The weight of the workpiece that reaches the design size after removing the rough allowance. 2.4 Weight of casting
The weight of the metal piece obtained after pouring molten metal into the mold and solidifying. 2.5 Casting yield rate
Within a certain period (month, quarter, year), the weight of qualified product castings accounts for the percentage of the total weight of the metal charge. 2.6 Ingredients ratio
The weight of a certain metal charge accounts for the metal charge Percent of total weight. 2.7 Recyclability rate
refers to the percentage of the metal charge that can be recycled and reused (including pouring risers, products, remaining molten metal, splashed iron beans, etc.) to the total weight of the metal charge.
2.8 Non-recoverable rate
The unrecoverable loss of metal charge during the casting production process accounts for the percentage of the total weight of the metal charge. 2.9 Coke-to-iron ratio
is the percentage of the weight of coke put into the furnace to the total weight of the metal charge. 2.10 Remaining molten metal
The molten metal remaining in the pouring container after the casting is poured. 3 Contents and calculation basis for formulating casting material consumption process quotas 3.1 Content
Who lists the contents of this standard as follows:
Calculation method of casting material consumption process quotas; a.
h ． Calculation method of metal charge technical and economic indicators Calculation method of metal charge consumption quota per ton of finished castings.
Approved by the Ministry of Machinery Industry of the People's Republic of China on 1993-07-27 and implemented on 1994-07-01
3.2 Calculation basis
JB/T 6983--93
3.2.1 Product drawings, parts design drawings and related design technical information. 3.2.2 Casting T. art documents, basic casting standards and other technical information. 4 Calculation and preparation of casting material consumption process quota 4.1 Calculation formula
The metal cutting rate is calculated according to formula (1):
Q
Where: Q. Casting metal cutting rate; | |tt||Gm casting weight, kg
-Part weight, kg.
G
G
Gm
t
Table A1 is prepared. 5 Calculation and preparation of metal charge consumption quota 5.1 Calculation and preparation of metal charge technical and economic indicators 5.1.1 Calculation formula
a.
Where: ge
G||tt| |Casting yield is calculated according to formula (2):
|h.
Total weight of metal charge.kg.
The recyclability rate is calculated according to formula (3):
|Weight of recyclable materials, kg;
G-Total weight of metal charge, kg.
C.
The non-recyclable rate is calculated according to formula (4):
GG
Pba
G
where: Phs| |tt||Non-recyclable rate;
Total weight of metal charge, kg
.--Weight of finished parts, kg
Weight of recyclable materials, kg.
d.
The molten metal yield is calculated according to formula (5):
P
where: the molten metal yield
Gx- --Weight of molten metal, kg:
G
Total weight of metal charge, kg.
Coke to iron ratio is calculated according to formula (6):
e.
208
-G
X100%
G|| tt|| )
中;P-
·Coke to iron ratio;
G
G
f.
Total weight of coke consumed, kg ,
The total weight of the metal charge, kg.
The power consumption per ton of molten metal is calculated according to formula (7): Wuzhong: Pu\
Ga
G| |tt||JB/T 6983-93
Pi:
Pa
-Power consumption per ton of molten metal, kw·ht
Total power consumption, kW·h;
The total weight of the metal charge thrown into the electric furnace, t.
5.1.2 Technical and economic indicators of metal charge
The technical and economic indicators of metal charge are compiled according to Table A2. a.
Casting scrap rate is calculated according to formula (8):
G
X100%-.
G
C
X100 %
G
X100%
grG+G
where: gi
G
G
b.
Where:
Casting scrap rate:
Scrap weight, kg;
Finished casting weight, kg.
The recycling rate of scrap castings is calculated according to formula (9):
G
X100%
gh
The recycling rate of scrap castings;
Gr
Weight of casting scrap, kg
G Total weight of metal charge, kg.
c.
The pouring and riser rate is calculated according to formula (10):
P
where: P
G
G
d.
Pouring and riser rate;
Pouring and riser weight, kg;
Total weight of metal charge, kg.
The molten metal rate is calculated according to formula (11):
P
In the formula: 1\\The molten metal rate;
-the total weight of the remaining metal , kg;
Gh
.-
G---Total weight of metal charge, kg.
G
×100%
G
G
Preparation 5.2.1 The metal charge consumption quota per ton of finished castings is calculated according to formula (12): G=
where: G
G
GG
G| |tt||Metal charge consumption quota per ton of finished castings, kg/t; total metal charge weight.kg;
G-·Recyclable material weight, kg:
6
(7)
(8)
(9)
(10)
(11)
(12)
20| |tt||G.-The weight of finished castings t.
JB/T6983-93
5.2.2 The consumption quota of a certain metal charge required for each ton of finished castings is calculated according to formula (13): 1000×gm
G
ge
in: G. - consumption quota of certain metal charge required for each ton of finished castings, kg; gp percentage of certain metal charge in the ingredients , %;ge
Casting yield, %.
5.2.3 The consumption quota of a certain metal charge per unit product is calculated according to formula (14): Ga
in: Ga
Gedn
g
g .
Gan %.
The metal charge consumption quota per ton of finished iron castings is prepared according to Table A3. 5.2.4
5.2.5
The metal charge consumption quota per ton of finished steel castings is prepared in accordance with Table A4 5.2.6
The metal charge consumption quota for non-ferrous alloy castings is compiled according to Table A5. 210
(13)
(14)
JB/T6983--93
Appendix A
Casting material consumption process schedule||tt| |(reference part)
A1 casting material consumption process quota tables are A4 format drawings, and their type and dimensions are shown in Tables A1 to A5!
Table
2||tt ||212
total
th
price
order
number
sing
to
Preparation
Quantity
Reheavy
Heavy
口
雷
Xihe
Heavy
pieces No.
Cast plate
Can
pieces
title
name
No.
picture
3
JB/T6983---93
012
8
1
National School
Chachao
（ )
(日)Tuo
2一
JB/T6983-93
012
5
Quality
top
8
th
arch
981-25
()
(日)
92|| tt||Golden harvest
probable rate
Xuanri
mouth implement
return
中
Lead||tt| Its
receive
return
willing wisdom
produce
2
table
business
0 | |tt |
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Title
Taiwan
Bottom
School
Picture
One trace

02X01
213
JB/T6983-93
012
5
page
Total No.|| tt||iron
a
(
2
disc
ZT
steel
scrap||tt| |262
Iron
Hao
Sing in
2
Cut
! Ji | | tt | | |tt | tt||02×01
211
JB/T6983---93
page
total number
town day
（ day)
(
2
e
2
boom
22
total
together
tt | |02
215
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